syncppp: Fix crashes.

The syncppp layer wants a mid-level netdev private pointer.

It was using netdev->priv but that only worked by accident,
and thus this scheme was broken when the device private
allocation strategy changed.

Add a proper mid-layer private pointer for uses like this,
update syncppp and all users, and remove the HDLC_PPP broken
tag from drivers/net/wan/Kconfig

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/wan/sealevel.c b/drivers/net/wan/sealevel.c
index 11276bf3149f..44a89df1b8bf 100644
--- a/drivers/net/wan/sealevel.c
+++ b/drivers/net/wan/sealevel.c
@@ -241,6 +241,7 @@ static inline struct slvl_device *slvl_alloc(int iobase, int irq)
                 return NULL;
 
         sv = d->priv;
+        d->ml_priv = sv;
         sv->if_ptr = &sv->pppdev;
         sv->pppdev.dev = d;
         d->base_addr = iobase;